MASSACHUSETTS DOUBLES TRIPLES PRACTICE CDL TEST
11.
When driving a truck with more than 1 trailer, drivers should:
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be especially careful in adverse conditions.
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look far ahead so they can slow down or change lanes when necessary.
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allow more following distance.
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All of the above.
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12.
With an engine fire, you should:
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not shoot foam from the vehicle’s underside.
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open the hood as soon as possible.
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turn the engine off as soon as possible.
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All of the above.
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13.
Strong winds can make it difficult to stay in your lane, especially when:
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coming out of tunnels.
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going into tunnels.
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driving at speeds below 40 mph.
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driving alongside other vehicles.
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14.
If you have to drive off the road, you should:
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brake as hard as you can to maintain control.
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leave the road completely.
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keep one set of wheels on the pavement, if possible.
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fully apply the brakes until your speed has dropped to about 20 mph.
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15.
Doubles and triples:
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can't be turned suddenly.
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can be turned suddently due to the low center of gravity.
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can be stopped suddenly due to their weight.
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have a lower chance of skidding.
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16.
The ABS malfunction lamp on the instrument panel is:
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Yellow
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Red
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Blue
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Orange
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17.
On dry pavement, the braking distance when traveling at 55 mph is about:
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419 feet.
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216 feet.
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61 feet.
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142 feet.
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18.
The earliest way to recognize that your trailer has started to skid is:
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by hearing squeaking noises from the wheels.
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by releasing the brakes.
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by checking your mirrors.
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by checking the jackknife sensor.
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19.
Emergency brakes must be held on by:
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dynamic pressure.
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mechanical force.
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air pressure.
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hydraulic pressure.
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20.
The average driver has a reaction time of:
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1/32 of a second.
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1/8 of a second.
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3/4 second to 1 second.
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1/16 of a second.
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